Electron-discharge device



Oct. 30 1923.

R. W. KING ELECTRON DISCHARGE DEVICE Filed A Fig.

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R. w. KING ELECTRON DISCHARGE DEVICE Filed Aug. 14 1919 2 Sheets-Sheet 2 Fig. 3;

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Patented Oct. 30, 1923.

UNITED STATES PATENT OFFICE.

ROBERT W. KING, OF NEW YORK, N. Y., ASSIGNOR TO WESTERN ELECTRIC COMPANY,

INCORPORATED, 015 NEW YORK, N. Y., A CORPORATION OF NEW YORK.

EIIECTRON-DISCHARGE DEVICE.

Application filed August 14, 1919. 8 eria1 No. 817,596.

To all whom it may cmwem:

Be it known that I, ROBERT W. KING, a citizen of the United States, residing at New York, in the county of New York, State of New York,-have invented certain new and useful Improvements in Electron-Discharge Devices, of which the following is a full, clear, concise, and exact description,

The invention relates to electron dlscharge devices for instance, of the audion type, and particularly to devices of this type that are adapted for use with high voltages and lar e operating currents.

n object of the invention is to provide a more rugged mounting for the electrodes than is possible in case the usual glass rod or arbor is employed. This object is accomplished by using a supporting standard located centrally of the tube, the standard being preferably of insulating material, such as lavite which is stronger than glass, the electrodes being supported from this standard. This construction permits a wide separation of the leading-in wlres which 1s advantageous in that leakage currents across or through the glass adjacent the seahng-in or supporting points of the lead wires are reduced to a minimum.

For further details of the invention, reference may be made to the drawings, 1n which Fig. 1 illustrates in perspective a vacuum tube embodying the invention, a single neck or stem on which the electrodes are mounted being employed; Fig. 2 is a cross-section view showing more in detail the manner of holding the lower end of the lavite supporting rod; Fig. 3 is a modification of Fig. 1 in which two inwardly projecting portions or stems are employed for su porting the electrodes.

eferring in detail to Fig. 1, the vacuum tube 1 is provided with the usual inwardly projecting stem or tubular portion 2, from which arises the concentric vitreous tubular portions 3 and 4. The vacuum tube is illustrated as of the audion type comprising a cylindrical anode 5 having located therein the cylindrical grid 6 and the filamentary cathode 7. Centrally located within the tubular portion 4 and lying along the axis of the tube is a rod 8 of insulating material such as lavite. Located within and running throughout the length of this rod of lavite is a wire which projects at its lower end at 9. This is also shown in Fig. 2, the wire 9 serving to position and hold the lower end of the lavite rod since this wire is welded to a platinum wire or wires 10, sealed into the septum 11 which seals and thereby renders airtight the top of the tubular portion 2. Intermediate its length the lavite rod 8 is supported by the contracted up er portion 12 of the tubular portion 4. ilxtending from the portion 13 of the wire extendlng from the top of the lavite rod 8 are a plurality of arms 14, which support the filamentary cathode '7 as shown. The filamentary cathode 7 is divided into parallel sectlons since alternate supporting arms 15 are electrically and mechanically connected to the band 16 clamping the tubular portion 4, the leading-in wire 17 being electrically connected to the band 16 at the points of the filaments electrically connected thereto. The remaining alternate supporting arms 18 are electrically and mechanically connected to the band 19, clamping the tubular portion 4 and electrically connecting it to the leading-in wire 20.

Beyond the portion of the wire 13 is a section 21 of lavite to which are clamped the arms 22 forming extensions of the longitudinal wires 29, upon which the grid turns are welded. The arms 22 may be clamped to the section 21 by metallic band 23.

The cylindrical anode 5 is provided with a plurality of extensions such as 24, which project through the lavite tubes 25 being clamped to the outer surface of the tubular portion 3'by the metallic band 26. The leading-in wire 27 connected to the band 26 serves as a lead for the anode. One or more of the lavite sections 25 is provided with a metallic band 28 which serves to hold and support the extension 29 of the longitudinal grid wire.

The various leading-in wires are sealed into the tubular portion 2 at widely separated p ints as shown to reduce leakage currents, as above described.

In the modification shown in Fig. 3, the

.center post 30 is provided with a cross-arm 31 from which extend the s5 supporting the two V-shape I filamentary cathode sections. The inner portions of these sections are electrically connected by the wires 33 and 34, clamped to the post 30 by the collar 35. The wire 36 forms one lead for the filament, the wire 37, the other. In this case the lower end of the grid 38 is ings 32 for supported by the relatively heavy-lead wire 39, the upper end of the grid being welded to a wire or wires 40, fastened to the up r end of the center post 30 b a collar 41. he

plate elements 42 and 43 x orming the anode are supported by the U-shaped wires 44 and 45, the ends of which are clamped to the tubular portion 46 by the band 47.

What is claimed is:

1. A vacuum tube device comprising an inwardly projecting tubular portion, a standard projecting therefrom and extending along the axis of said tube, a grid, an anode at one side of said grid, a cathode at another side thereof, and clamping means for su porting a plurality of said electrodes on sai standard.

2. A vacuum tube device comprising an inwardly projecting tubular portion, a standard arising therefrom, an insulating member carried by said standard, a grid electrode surrounding said standard, and supporting connections between said insulating member and said grid electrode.

3. A vacuum tube device comprising an inwardly projecting portion, a standard arising therefrom, an insulating member carried by said standard, a grid electrode surroundin said standard, a cathode within said grid e ectrode, supporting connections between said insulating member and said cathode and grid electrodes, and an anode exterior of said grid electrode.

4. A vacuum tube device comprising an electrode, and a rod of lavite extending through said electrode along the axis of said tube, and means on said rod for clamping said electrode thereto.

5. A vacuum tube device comprising an inwardly projecting tubular portion, a plurality of electrodes, extensions from one of said electrodes, clamping means for fastening said extensions to said tubular portion, and means for supporting another of said electrodes from one of said extensions.

6. A vacuum tube device comprising an inwardly projecting tubular portion, cathode, anode and control electrodes, extensions from said anode, means for fastening said extensions to said tubular portion, and means for sup orting said control electrode from said ano e.

7. A vacuum tube device comprising a plurality of coaxial inwardly projecting portions at one end of said .tube, a plurality of electrodes, supporting connections between one of said portions and one of said electrodes, and supporting connections between another of said portions and another electrode.

.8. A vacuum tube device comprising a grid electrode, a standard inside of said grid, 2. standard outside of said grid, and supporting connections between said standards and said grid.

9.' A vacuum tube comprising an electro'de, a rod for supporting said electrode, .1 connection between one end of said rod and a portion of said tube, and means for supporting said rod at a point intermediate its ength.

10. A vacuum tube comprising an electrode, a rod for supporting said electrode, a onnectlon between one end of said rod and a portion of said tube, and a, tubular member integral with said tube, surrounding and supporting said rod.

11, A vacuum tube comprising a tubular portion, a filamentary electrode, and memiers on saidtubular portion for connecting sections of said electrode in parallel.

12. A vacuum tube comprising a tubulai portion, a filamentary electrode, a supporting wire for said electrode, and a band for clamping said wire to said portion.

A vacuum tube comprising a tubular portion, a filamentary electrode, supporting wires for said electrode, and bands for clamping said wires to said portion and for connecting the sections of said electrode in parallel.

14. A vacuum tube comprising coaxial tubular portions, a rod within and supported by ene of said tubular portions, cathode, anode and control electrodes, and supporting connections from said electrodes to said rod and tubular portions.

15. A vacuum tube comprising coaxial tubular portions, a rod within and supported by one of said tubular portions, cathode, anode and control electrodes, means for supporting said anode from one of said tubular portions, and supporting connections between aid rod and said cathode and control electrodes.

16. A vacuum tube comprising a tubular portion, a standard supported by said tubular portion, said standard including a metallic rod extending substantially the full length of the tube, a sleeve of insulating material on said rod, an insulating member carried by one end of said rod, a plurality of concentric electrodes, and supporting connections between aid insulating member nd said electrodes.

In witness whereof, I hereunto subscribe my name this 11th day of August, A. D 1919.

ROBERT WLKIN G. 

